Concrete beam.



P. AYLETT & J. S. BANKS. CONCRETE BEAM.

APPLICATION FILED D30. 27, 1906.

1 918,643.- Patnted Apr.20, 1909.

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BANKS, OI" PORTSMOUTH, VIRGINIA.

PHILIP AYLE'IT AND JOHN SCOTT CONCRE TE BEAM.

Application filed. December 27, 1906.

T 0 all whom it may concern:

Be it known that we, PHILIP Avnnrr and JOHN S. BANKS, citizens of theUnited States, residing at Portsmouth, in the county of Norfolk andState of Virginia, have invented certain new and useful Improvements inConcrete Beams; and we do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to concrete structures.

The object of the invention is in a ready, thoroughly practical andcomparatively inexpensive manner to construct concrete beams, columns,girders, pile caps, etc., or effectively to shield the metallic membersof existing or proposed structures, or members made of wood or othermaterial, which require protection from destructive agents.

In the accompanying drawings, forming a part of this specification, andin which like characters of reference indicate correspondingparts,-Figure 1 is a transverse sectional view, showing the manner ofprotecting a metallic beam or girder; Fig. 9. is a perspective detailView of the clamp shown in Fig. 1; Fig. 3 is a perspective detail view,showing a modification of the clamp shown in Fig. 1; Figs. 1 and 5 arefragmentary detail views, in perspective, of other modified forms ofclamps; and Fig. (3 is a view in elevation, partly in section, of amodification of the structure shown in Fig. 1.

One form of carrying out the invention in the protection of the beams orgirders of existing or proposed structures, is shown in Figs. 1 and 2.As shown in Fig. 1, the skeleton frame consists of furring t of metallicbars or strips, which are bent to the appropriate form to surround andbe spaced from the girder or beam 5, the upper and lower terminals ofthe furring members being connected by straight furl-ing members '6. Thefurring members are held spaced flanges of the girders and confinedtherewith, by clamps, one of which is shown in detail in Fig. 2, andcomprises a base plate 7 the terminals of which are bifurcated orincised on curved or straight lines 8 and 9, the two diagonallyoppositetongues 10 formed by the incisions being bent around the flanges of thegirder, and the two tongues 11 being disposed at Specification ofLetters Patent.

Patented April 20, 1909.

Serial No. 349,673.

right angles to the base and provided with orilices 12 to receive thefur-ring (3. The furring l and (3 are secured together at theirterminals by rivets or bolts 13. Secured to the exterior of the furring-l and (3 is wire netting, expanded metal, or herringbone lathing 1 1-,which is held combined with the furring by being wired thereto, or inany other manner, and to the exterior of the sheathing formed by themetal is applied a coating of plaster is. YV hen this plaster hashardened, concrete 23 is supplied to the space between the skeletonframe and the girder in any preferred manner, as by being pumpedtherein, and when the concrete sets the entire girder will be thoroughlypro tected against any destructive agent.

It is to be understood that the skeleton frame or mold shown in Fig. 1,and which consists of the furring and 6, clamps, sheathing and plastersurface 15, may be applied to a girder already erected, or to one thatis to be positioned. It is also to be understood that this protectivecement structure is equally adaptable for use in connection with woodenor other girders, and as this will be readily understood, detaildescription thereof is omitted.

Instead of employing the form of tongues 11, shown in Fig. 2, thesetongues may have their upper portions bent to lie parallel with the baseplate 7, as shown at 16, Fig. 3, and to these inturned ears orprojections, the furring (5 will be secured as by being riveted, boltedor wired thereto.

In the modification shown in Fi 1, the tongue 17, which corresponds tothe tongue 11 in Fig. :2, is straight, that is, is devoid of a curvededge, while in the modification shown in Fig. 5 the tongue 18, thatcorresponds to the tongue 16 in Fig. 3 is extended, on both sides,laterally some distance beyond the edges of the beam flanges in order topermit the placing of a larger amount of cement on the steel structure.

In the modification shown in Fig. 6, the tongues 19, that correspond tothe tongues 11 in Fig. 1, are devoid of the orifices 12, and in lieuthereof their outer edges are provided with notches or seats 20 that aredesigned to be engaged by the furring 21 which is seated in the notches,and bent to the appropriate form, the free ends 22 being connected inany preferred manner as by riveting, wiring or the like. In this latterarare simple in construction, they rangement the furring is constructedof a single piece, instead of four pieces, as shown in Fig. 1.

It will be seen from the foregoing, that although the improvementsherein will be thoroughly effective and may be carried out without therequirement of any particular form of machinery for the purpose.

Having thus described our invention, what we claim as new and desire tosecure by Letters-Patent, is

l. The combination with a girder, of clamps secured thereto,upper andlower furring members secured to the clamps, lateral furring memberssecured to thefirst-named furring members, an open-work sheathingsecured to the exterior of all the furring members, an exterior plastersurface applied to the sheathing, and an interior concrete fillingdisposed around the girder and interit i I r i r 1 I I f 1 locked withthe tuning members and with the sheathing.

2. The combination with a girder, of clamps secured to the flangesthereof, upper and lower furring members secured to the clamps, lateralfurring members secured to the first-named furring members, an openworksheathing secured to the exterior of all of the furring members, anexterior plaster surface applied to the sheathing, and an interiorconcrete filling disposed around the girder and interlocked with thefurring members and with the sheathing.

In testimony whereof we have hereunto set our hands in presence of twosubscribing witnesses.

PHILIP AYLETT. JOHN SCOTT BANKS. Witnesses G. M. PAYNE, XV. H. T. LYON.

